109 lines
4.7 KiB
C++
109 lines
4.7 KiB
C++
//
|
|
// ********************************************************************
|
|
// * DISCLAIMER *
|
|
// * *
|
|
// * The following disclaimer summarizes all the specific disclaimers *
|
|
// * of contributors to this software. The specific disclaimers,which *
|
|
// * govern, are listed with their locations in: *
|
|
// * http://cern.ch/geant4/license *
|
|
// * *
|
|
// * Neither the authors of this software system, nor their employing *
|
|
// * institutes,nor the agencies providing financial support for this *
|
|
// * work make any representation or warranty, express or implied, *
|
|
// * regarding this software system or assume any liability for its *
|
|
// * use. *
|
|
// * *
|
|
// * This code implementation is the intellectual property of the *
|
|
// * GEANT4 collaboration. *
|
|
// * By copying, distributing or modifying the Program (or any work *
|
|
// * based on the Program) you indicate your acceptance of this *
|
|
// * statement, and all its terms. *
|
|
// ********************************************************************
|
|
//
|
|
// $Id: G4LowEnergyPolarizedRayleigh.hh,v 1.4 2005/05/20 15:19:18 pia Exp $
|
|
// GEANT4 tag $Name: geant4-08-00 $
|
|
//
|
|
// --------------------------------------------------------------
|
|
//
|
|
// File name: G4LowEnergyPolarizedRayleigh.hh
|
|
//
|
|
// Author: Capra Riccardo
|
|
//
|
|
// Creation date: May 2005
|
|
//
|
|
// History:
|
|
// -----------
|
|
// 02 May 2005 R. Capra 1st implementation
|
|
//
|
|
//----------------------------------------------------------------
|
|
|
|
|
|
#ifndef G4LowEnergyPolarizedRayleigh_hh
|
|
#define G4LowEnergyPolarizedRayleigh_hh
|
|
|
|
#include "G4VLowEnergyDiscretePhotonProcess.hh"
|
|
|
|
// G4LowEnergyPolarizedRayleigh
|
|
// The class implements the polarized Rayleigh process
|
|
//
|
|
// Specialization of G4VLowEnergyDiscretePhotonProcess class.
|
|
// This is a preliminary implementation of the Rayleigh polarized process.
|
|
// Reference articles are:
|
|
//
|
|
// Rayleigh process: The Quantum Theory of Radiation
|
|
// W. Heitler, Oxford at the Clarendon Press, Oxford (1954)
|
|
// Scattering function: A simple model of photon transport
|
|
// D.E. Cullen, Nucl. Instr. Meth. in Phys. Res. B 101 (1995) 499-510
|
|
// Polarization of the outcoming photon: Beam test of a prototype detector array for the PoGO astronomical hard X-ray/soft gamma-ray polarimeter
|
|
// T. Mizuno et al., Nucl. Instr. Meth. in Phys. Res. A 540 (2005) 158-168
|
|
//
|
|
class G4LowEnergyPolarizedRayleigh : public G4VLowEnergyDiscretePhotonProcess
|
|
{
|
|
public:
|
|
// Class constructor
|
|
// processName The name of the process
|
|
G4LowEnergyPolarizedRayleigh(const G4String &processName = "polarLowEnRayleigh");
|
|
|
|
// Class destructor
|
|
inline virtual ~G4LowEnergyPolarizedRayleigh(void) {}
|
|
|
|
// Calculates the new photon direction and polarization
|
|
//
|
|
// In the code the following definitions are used
|
|
// aTrack The track
|
|
// aStep The step
|
|
// The proposed changes for the photon
|
|
virtual G4VParticleChange* PostStepDoIt(const G4Track& aTrack, const G4Step& aStep);
|
|
|
|
private:
|
|
|
|
// Hides copy constructor
|
|
G4LowEnergyPolarizedRayleigh(const G4LowEnergyPolarizedRayleigh&);
|
|
|
|
// Hides assignment operator
|
|
G4LowEnergyPolarizedRayleigh & operator=(const G4LowEnergyPolarizedRayleigh&);
|
|
|
|
// Generates \f$cos \left ( \theta\right )\f$ of the scattered photon
|
|
// incomingPhotonEnergy The energy of the incoming photon
|
|
// zAtom Atomic number
|
|
// \f$cos \left ( \theta\right )\f$
|
|
G4double GenerateCosTheta(G4double incomingPhotonEnergy, G4int zAtom) const;
|
|
|
|
// Generates \f$\phi\f$ of the scattered photon
|
|
// cosTheta \f$cos \left ( \theta\right )\f$ of the scattered photon
|
|
// \f$\phi\f$
|
|
G4double GeneratePhi(G4double cosTheta) const;
|
|
|
|
// Generates the polarization direction \f$\beta\f$ in the plane x, y relative to the x direction
|
|
// \f$\beta\f$
|
|
G4double GeneratePolarizationAngle(void) const;
|
|
|
|
// Lower energy limit due to the available data in the physics tables
|
|
G4double intrinsicLowEnergyLimit;
|
|
|
|
// Higher energy limit due to the available data in the physics tables
|
|
G4double intrinsicHighEnergyLimit;
|
|
};
|
|
|
|
#endif /* G4LowEnergyPolarizedRayleigh_hh */
|